JPS5414079A - Trouble detector for light-ray type safety device - Google Patents

Trouble detector for light-ray type safety device

Info

Publication number
JPS5414079A
JPS5414079A JP8021277A JP8021277A JPS5414079A JP S5414079 A JPS5414079 A JP S5414079A JP 8021277 A JP8021277 A JP 8021277A JP 8021277 A JP8021277 A JP 8021277A JP S5414079 A JPS5414079 A JP S5414079A
Authority
JP
Japan
Prior art keywords
safety device
light
type safety
ray type
trouble detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8021277A
Other languages
Japanese (ja)
Other versions
JPS5829440B2 (en
Inventor
Shunichi Nagai
Yasuhiro Umano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP52080212A priority Critical patent/JPS5829440B2/en
Priority to DE19782827863 priority patent/DE2827863A1/en
Publication of JPS5414079A publication Critical patent/JPS5414079A/en
Publication of JPS5829440B2 publication Critical patent/JPS5829440B2/en
Expired legal-status Critical Current

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Abstract

PURPOSE: To ensure the operation of a safety device and improve safety, by detecting abnormalities of light emitting elements, light receiving elements and peripheral circuits thereof in the safety device.
COPYRIGHT: (C)1979,JPO&Japio
JP52080212A 1977-07-04 1977-07-04 Failure detection device for optical safety equipment Expired JPS5829440B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP52080212A JPS5829440B2 (en) 1977-07-04 1977-07-04 Failure detection device for optical safety equipment
DE19782827863 DE2827863A1 (en) 1977-07-04 1978-06-24 Optical safety system for press - has sub-system to periodically produce artificial fault condition by interrupting optical couplings using relay to actuate counter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52080212A JPS5829440B2 (en) 1977-07-04 1977-07-04 Failure detection device for optical safety equipment

Publications (2)

Publication Number Publication Date
JPS5414079A true JPS5414079A (en) 1979-02-01
JPS5829440B2 JPS5829440B2 (en) 1983-06-22

Family

ID=13712070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52080212A Expired JPS5829440B2 (en) 1977-07-04 1977-07-04 Failure detection device for optical safety equipment

Country Status (1)

Country Link
JP (1) JPS5829440B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56501293A (en) * 1979-09-10 1981-09-10
JPS5961226A (en) * 1982-09-30 1984-04-07 Anritsu Corp Device for discriminating fault of optical switch
JPS6068725U (en) * 1983-10-18 1985-05-15 株式会社山武 photoelectric switch
JPS6431294U (en) * 1987-08-19 1989-02-27
JPS6464902A (en) * 1987-09-03 1989-03-10 Riken Optical Kk Optical malfunction detecting circuit and system check device therefor in garbage collection vehicle
US5268635A (en) * 1992-07-31 1993-12-07 At&T Bell Laboratories Intelligent self-diagnosing and sparing light emitting diodes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59229369A (en) * 1983-06-07 1984-12-22 Rohm Co Ltd Thermal printing head

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5270486A (en) * 1975-12-10 1977-06-11 Raisaburou Jitsui Safety device for machine tool

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5270486A (en) * 1975-12-10 1977-06-11 Raisaburou Jitsui Safety device for machine tool

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56501293A (en) * 1979-09-10 1981-09-10
JPS5961226A (en) * 1982-09-30 1984-04-07 Anritsu Corp Device for discriminating fault of optical switch
JPH0311577B2 (en) * 1982-09-30 1991-02-18 Anritsu Corp
JPS6068725U (en) * 1983-10-18 1985-05-15 株式会社山武 photoelectric switch
JPS6431294U (en) * 1987-08-19 1989-02-27
JPH0544637Y2 (en) * 1987-08-19 1993-11-12
JPS6464902A (en) * 1987-09-03 1989-03-10 Riken Optical Kk Optical malfunction detecting circuit and system check device therefor in garbage collection vehicle
US5268635A (en) * 1992-07-31 1993-12-07 At&T Bell Laboratories Intelligent self-diagnosing and sparing light emitting diodes

Also Published As

Publication number Publication date
JPS5829440B2 (en) 1983-06-22

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